Standard Color Codes ClassMeaningColor CLASS C less than 500 GPM RED CLASS B 500 to 999 GPM ORANGE CLASS A 1,000 to 1,499 GPM GREEN CLASS AA greater than 1500 GPM LIGHT BLUE
Fire hydrants All Fairfax Water hydrants are painted red with a silver top, with exception to the hydrants in the former City of Falls Church service area which are silver with red tops.
Ing to the standards, the hydrant body (barrel) should be chrome yellow unless the jurisdiction has adopted a different color (white, chrome silver or lime-yellow). The top (bonnet) and nozzle caps (discharges) should be color-coded to indicate hydrant flow.
You may obtain the deed book and page number by searching for the document in the Court Public Access Network (“CPAN”) on one of the public computers in the Land Records Research Room or through a subscription. Subscribers to CPAN are able to make non-certified copies from their own computer.
High-pressure hydrants are painted blue. Black indicates a restricted-use hydrant. And if a hydrant is painted purple, it means the hydrant is connected to a water source that isn't safe to drink—like recycled water or water from a pond—but is still great for putting out fires.
NFPA 291 - Standard Color Codes for Flow at 20 P.S.I. are as follows: CLASS C LESS THAN 500 GPM - RED. CLASS B 500-999 GPM - ORANGE. CLASS A 1000-1499 GPM - GREEN.